net/i40e: support deleting TM node

Add the support of the Traffic Management API,
rte_tm_node_delete.

Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>

diff --git a/drivers/net/i40e/i40e_tm.c b/drivers/net/i40e/i40e_tm.c
index 3017185..b05eff8 100644 (file)
--- a/drivers/net/i40e/i40e_tm.c
+++ b/drivers/net/i40e/i40e_tm.c
@@ -51,12 +51,15 @@ static int i40e_node_add(struct rte_eth_dev *dev, uint32_t node_id,
                         uint32_t weight, uint32_t level_id,
                         struct rte_tm_node_params *params,
                         struct rte_tm_error *error);
+static int i40e_node_delete(struct rte_eth_dev *dev, uint32_t node_id,
+                           struct rte_tm_error *error);
 
 const struct rte_tm_ops i40e_tm_ops = {
        .capabilities_get = i40e_tm_capabilities_get,
        .shaper_profile_add = i40e_shaper_profile_add,
        .shaper_profile_delete = i40e_shaper_profile_del,
        .node_add = i40e_node_add,
+       .node_delete = i40e_node_delete,
 };
 
 int
@@ -615,3 +618,66 @@ i40e_node_add(struct rte_eth_dev *dev, uint32_t node_id,
 
        return 0;
 }
+
+static int
+i40e_node_delete(struct rte_eth_dev *dev, uint32_t node_id,
+                struct rte_tm_error *error)
+{
+       struct i40e_pf *pf = I40E_DEV_PRIVATE_TO_PF(dev->data->dev_private);
+       enum i40e_tm_node_type node_type = I40E_TM_NODE_TYPE_MAX;
+       struct i40e_tm_node *tm_node;
+
+       if (!error)
+               return -EINVAL;
+
+       /* if already committed */
+       if (pf->tm_conf.committed) {
+               error->type = RTE_TM_ERROR_TYPE_UNSPECIFIED;
+               error->message = "already committed";
+               return -EINVAL;
+       }
+
+       if (node_id == RTE_TM_NODE_ID_NULL) {
+               error->type = RTE_TM_ERROR_TYPE_NODE_ID;
+               error->message = "invalid node id";
+               return -EINVAL;
+       }
+
+       /* check if the node id exists */
+       tm_node = i40e_tm_node_search(dev, node_id, &node_type);
+       if (!tm_node) {
+               error->type = RTE_TM_ERROR_TYPE_NODE_ID;
+               error->message = "no such node";
+               return -EINVAL;
+       }
+
+       /* the node should have no child */
+       if (tm_node->reference_count) {
+               error->type = RTE_TM_ERROR_TYPE_NODE_ID;
+               error->message =
+                       "cannot delete a node which has children";
+               return -EINVAL;
+       }
+
+       /* root node */
+       if (node_type == I40E_TM_NODE_TYPE_PORT) {
+               tm_node->shaper_profile->reference_count--;
+               rte_free(tm_node);
+               pf->tm_conf.root = NULL;
+               return 0;
+       }
+
+       /* TC or queue node */
+       tm_node->shaper_profile->reference_count--;
+       tm_node->parent->reference_count--;
+       if (node_type == I40E_TM_NODE_TYPE_TC) {
+               TAILQ_REMOVE(&pf->tm_conf.tc_list, tm_node, node);
+               pf->tm_conf.nb_tc_node--;
+       } else {
+               TAILQ_REMOVE(&pf->tm_conf.queue_list, tm_node, node);
+               pf->tm_conf.nb_queue_node--;
+       }
+       rte_free(tm_node);
+
+       return 0;
+}